Miyun District is situated in the northeast of Beijing, serving as a crucial administrative region for drinking water source and a key ecological conservation zone for the capital. The district covers a total area of 2,229.45 square kilometers, making it the largest district in Beijing by area. It administers two sub-districts, 17 towns, and one township (regional office). By the end of 2024, the district's permanent population was 524,000, while its GDP reached 37.4 billion yuan.

The Miyun Reservoir, as North China's largest artificial lake, sits at the heart of the district, with a maximum surface area of 188 square kilometers and a maximum storage capacity of 4.375 billion cubic meters.

Miyun District is China's national ecological zone and a world-renowned livable region with recreational offerings. The forest coverage rate of the district reached 75.3 percent. The annual percentage of days when the air quality is of or better than Grade II has remained above 73.7 percent for four consecutive years. The content of negative oxygen ions in the air is 40 times higher than that in the capital's urban region. The district also ranked No. 1 in terms of ecological quality in the whole city. Miyun is a famous "Home of the Longevity" of Beijing, with more than 600 elders over 90 years old.